Differentiating CSS for IE7 IE6 and firefox
if you put # before any css tag, only IE 7 and IE 6 will read that line.
if you put _ before any css tag, only IE 6 will read that line.
example:
width: 560px; /* All other browsers */ #width: 558px; /* IE 6 & 7 */ _width: 557px; /* IE 6 */
just remember to keep this order.